Pneumatic locking mechanism



M. ZEBICH.

PNEUMATIC LOCKING MECHANISM. APPLICATION FILED AUG-26, 1921.

Patented Mar. 14, 1922.

j 8 9 20 Uiwvgss If IWVENm Z UNITED STATES PATENT OFFICE.

MIKEVZEBICH, OFIWOODLAWN, PENNSYLVANIA, ASBIGNOR or ONE-HAL! TO LOUIS rnn'rmomor EAsrrITTsBURGH, PENNSYLVANIA.

1 1 TBNEITMATIGVLOCKINGMECHANISM,

. Specification of Lettets Patent.

Patented Mar. 14, 1922.

Application filed August '26, 1921. Serial No. 495,614.

.- To oil w/wmit may concern Be it known that I, MIKE ZEBICH, a'subect otthe Government of Austria, residin" at lloodlawn, in-the county of Beaver an State otPennsylvania, have invented cer-' tainnew and useful-Improvements in Pneumatic Locking Mechanism, of which'the following is a specification.

Y Thisinvention relates to locking mechanisms, particularly fluid pressure operated locking-mechanisms, especially adapted for railway freight and express cars, but it will be obvious that the device may be employed for any purposes wherein it is found to be applicable;

The primary object of the invention is to provide a locking mechanism of the character described, in a manner as hereinafter set *forth, which will permit of the unlocking of the doors supplied therewith only when fluid pressure is available and used to operate the mechanism of the device, therefore freight and express cars having doors provided with such device would be practically immune from marauders when disconnected from the train in transit, which otherwise would be liable to depredations when cars are located at isolated sidings at various times before reaching destinations.

Further objects of the invention are to provide a device of the type stated, which is simple in its construction and arrangement, strong, durable and efficient in its use, posi tive in its action, and comparatively inexpensive to manufacture.

To the accomplishment of these and such other objects as may hereinafter appear, the invention consists of the novel construction, combination and arrangement of parts herein specifically described and illustrated in the accompanying drawing, wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications may be resorted to which come within the scope of the claims hereunto appended.

In the drawing forming a portion of this specification and wherein like numerals of reference designate corresponding parts throughout the several views Figure 1 is a side elevation of a pair of car doors provided with a locking mecha nism in accordance with the invention.

Figure 2 is an enlarged sectional view of the device.

Referring in detail to the drawing 1 denotes a car body provided with a pair of sliding doors 2 and 3, respectively.

I ix'edly secured to the car structure above and intermediate of the door juncture is a vertically disposed cylinder or casin 4 provided with a. bore 5. The lower end of the casing 4 is closed by a cylinder head 6 secured thereto by means of the bolts 7 The upper end of the casing 4 and the lower face of the head 6 are formed with lugs 8 with apertures 9 for the passage of the bolts 10 for securing the casing to the car structure.

Mounted for vertical movement in the easing 4 is a piston'll to which connects a stem 12 the upper end of which is seated slidably in the'bearing 13 formed in the top of the casing 4. Fixed to the stem 12 at approxintately the central portion thereof, is a disk 14 having a depending peripheral flange 15. A spring 16 is mounted on the stem 12 intermediate of the disk 14 and the top of the casing 4. The action of the spring 16 normally holds the disk 14, and associated parts, in the downward position.

Each of the doors 2 and 3 is provided with a latch member 17 which are adapted to project through respective apertures 18 and 19, formed in the casing 4, and engage the flange 15 of the disk 14 for securing the doors in the locked position.

The flanged disk 14 is so positioned in the casing 4 relative to the apertures'18 and 19 that movement of the latch members 17 will automatically shift the disk 14 and engage the flange 15.

The doors can only be unlocked by supplying fluid pressure against the piston 11 through the conduit 20 which communicates with the casing through the port 21. The upward movement of the piston and associated parts is limited by the lugs 22 which are adapted to engage the upper face of the disk 14 and formed on the inner face of the casing 4. A valve 23 is positioned in the conduit 20.

As the device is primarily intended for use in connection with railway cars, air pressure would be used for operating the looking mechanism. 7 Unless a locomotive supplying air is connected with the car the doors of. the latter cannot be opened. By operating the valve 23 the air will operate the piston 11 and release the flange 15 from the latching members 17. When air is released having an upwardly extending stem, a look; ing disk within the casing and secured to the disk 14: and associated parts will return osition by the action of the alve 23 is then closed and the to normal spring 16. device will automatically lock the doors when next they are closed. a, r

It will be obvious that the use of my improved locking device will prevent many depre'dations as the doors of the cars can only be unlocked when car is 'connected'to train with locomotive supplying the necessary air pressure.

WVhat Iclaim is: I V I 1. A locking mechanism for the purpose set forth comprising a casing, a fluid pressure operated piston arranged therein and the stem intermediate the ends of the latter and provided with a depending flange, a resilient element within the casing and bearing against said disk for maintaining it normally in operative position, a latching means carried by the object to be locked and capable of extending through the wall of and into the cylinder. andengaged by an d held in latching'p osition by said disk, and means for supplying motive fluid to shift the piston wherebyithe disk is moved so that its flange clears thelatcliing means, and means Withinv the casing for limiting'the release movement of the locking disk. I i

2. A locking mechanism for the purpose set iforth comprising a. casing, a fluid pressure operated piston arranged therein and having an upwardly'extending stem, alock- -normallyin operative position, a latchin ing disk within the casing and secured to the stem and provided with a depending flange,

a resilient element within the casing and bearingagainst the disk for maintaining it means carried by the object to be locked and capable of extending through the wall of and into the cylinder and engaged by and held in latching position by said disk, andi means for supplying motive fluid to shift1 the piston whereby the disk is moved so that its flange clears the latching means, and

means within the casing for limiting the release movement of the locking disk;

3. A locking mechanism for the purpose 5 set forth comprising a casing, a fluid pressure operated piston arranged therein and having an upwardly extending stem, a looking disk within the casing and secured to\ the' stem and provided with a depending whereby the disk is moved so that its flange clears the latching means, and means within the casing for limiting the release movement I of the locking disk.

In testimony whereof I aflix my signature.

,- MIKE ZEBIOH. 

